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BUSINESS SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Summary of Segment Reporting Information by Segment

The following table is a summary of segment information for the three and nine months ended September 30, 2025 and 2024. Segment asset information is not presented since it is not received by the CODM at the operating segment level. The CODM regularly reviews certain consolidated expenses, including employee compensation costs. "Other segment items" principally consist of costs for obtaining, transporting and testing specimens, facility costs used for the delivery of the Company's services, costs associated with the Company's sales and marketing efforts, and costs related to billing operations. Operating income (loss) of each segment represents net revenues less directly identifiable expenses. General corporate activities included in the table below are comprised of general management and administrative corporate expenses, amortization and impairment of intangibles assets and other operating income and expenses, net of certain general corporate activity costs that are allocated to the DIS and DS businesses. The accounting policies of the segments are the same as those of the Company as set forth in Note 2 to the audited consolidated financial statements contained in the Company’s 2024 Annual Report on Form 10-K and Note 2 to the interim unaudited consolidated financial statements.

			Three Months Ended												Nine Months Ended
			September 30, 2025												September 30, 2025
			DIS												Total						DIS						Total
Net revenues			$	2,755											$	2,755					$	8,043					$	8,043
DS revenues															61												186
Total net revenues															$	2,816											$	8,229
Less: Other segment items			2,273																		6,653
Segment operating income			$	482											$	482					$	1,390					$	1,390
DS operating income															9												24
General corporate activities															(105)												(244)
Total operating income															386												1,170
Non-operating expense, net															(58)												(182)
Income before income taxes and equity in earnings of equity method investees															328												988
Income tax expense															(77)												(233)
Equity in earnings of equity method investees, net of taxes															8												35
Net income															259												790
Less: Net income attributable to noncontrolling interests															14												43
Net income attributable to Quest Diagnostics															$	245											$	747

			Three Months Ended												Nine Months Ended
			September 30, 2024												September 30, 2024
			DIS												Total						DIS						Total
Net revenues			$	2,427											$	2,427					$	7,058					$	7,058
DS revenues															61												193
Total net revenues															$	2,488											$	7,251
Less: Other segment items			2,020																		5,858
Segment operating income			$	407											$	407					$	1,200					$	1,200
DS operating income															6												23
General corporate activities															(83)												(238)
Total operating income															330												985
Non-operating expense, net															(34)												(109)
Income before income taxes and equity in earnings of equity method investees															296												876
Income tax expense															(65)												(205)
Equity in earnings of equity method investees, net of taxes															6												14
Net income															237												685
Less: Net income attributable to noncontrolling interests															11												36
Net income attributable to Quest Diagnostics															$	226											$	649

    Depreciation and amortization expense for the three and nine months ended September 30, 2025 and 2024 was as follows:

    

			Three Months Ended September 30,												Nine Months Ended September 30,
			2025						2024						2025						2024
DIS business			$	99					$	90					$	296					$	258
All other operating segments			3						3						10						9
General corporate			40						32						119						91
Total depreciation and amortization			$	142					$	125					$	425					$	358

X

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

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No definition available.

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